Description
Carrageenan is a kind of nature polysaccharides hydrocolloid which is present in the structures of certain varieties of red seaweed. These carbohydrates have the ability to form, at very low concentrations, thick solutions or gels in aqueous media.
Specification:
| Appearance | White to slight yellow powder | |
| Moisture(105centi-digree,4h) | ≤7.5% | |
| Particle Size | 90% Crossed 80 mesh | |
| Total Ash(750 centi-digree,4h) | ≤40 | |
| Viscosity(1.5%,75 centi-digree,#1sp 30rpm) | ≥5mPa.s | |
| PH (1.5%w/w,60 centi-digree) | 7-10 | |
| Total Sulphate | 15-40% | |
| Water Gel Strength (1.5%w/w,20centi-digree,10h) | K101: 1350g/cm2 | |
| Acid Insoluble Ash | ≤1% | |
| Heavy metal | ||
| As (mg/kg) | ≤3 | |
| Pb (mg/kg) | ≤5 | |
| Cd (mg/kg) | ≤1 | |
| Hg (mg/kg) | ≤1 | |
| Microbiology | ||
| Total Plate Count (cfu/g) | ≤5000cfu/g | |
| Yeast & Moulds(cfu/g) | ≤300cfu/g | |
| E. coli | negative by test | |
| Salmonella | negative by test |
Carrageenan mainly has three classes:
1. Kappa carrageenan(kappa refined carrageenan, kappa semi-refined carrageenan). This forms is strong and rigid gels in the presence of potassium ions; it reacts with dairy proteins. It is sourced mainly from Eucheuma cottonii.
2. Iota carrageenan(Iota refined carrageenan, Iota semi-refined carrageenan). This forms is soft gels in the presence of calcium ions. It is produced mainly from Eucheuma spinosum.
3. Lambda carrageenan. This forms does not gel, and is used to thicken dairy products. The most common source is Gigartina from South America.
Application:
1.In food industry, carrageenan can be used as gelling agent, thickener, stabilizer, suspending agent and clarifier, and can be used in products such as soft candy, jelly, sausage, canned meat, ice cream, beverage, condiment, milk, bionic food, jam, canned thick soup, beer, bread, pet food and so on;
2.In pharmaceutical industry, it can be used as medicine suspending agent and dispersant, and can be used to produce capsule products etc.
3.In daily chemical industry, it can be used in toothpaste, detergent, cosmetics and air freshener;
4.In biochemistry, carrageenan can be used as carrier of microorganism and immobilized cells;
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